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Which principle of heat exchange is the most important explanation for why birds look larger in colder weather because they fluff their feathers?.

Which principle of heat exchange is the most important explanation for why birds look larger in colder weather because they fluff their feathers?.
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Which principle of heat exchange is the most important explanation for why birds look larger in colder weather because they fluff their feathers?.

User SGeorgiades
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1 Answer

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Fluffing creates a pocket of air near the bird that acts as insulation.
User Nizzik
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